Port Hueneme, CA 91358 Frost Dates
91358, near Port Hueneme, CA: the frost window
Typically, the last spring freeze lands around 12/29, roughly 123 days out. Fall's first freeze usually shows up around 12/24, roughly 365 days after the last spring frost.
Port Hueneme sits in USDA Zone 10a (30 to 35°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Port Hueneme's growing season runs out in roughly 17 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
12/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/09 and only about 1 year in 10 sees frost after that.
Port Hueneme against the rest of the dataset
About 365 days separate Port Hueneme's last and first frost, putting it 1,206 of 40,283 ZIP codes nationally. Within CA, it ranks 524 of 2,555.
Learn more
Two guides worth reading on 91358: zone vs. frost date, on why Zone 10a and Port Hueneme's frost date answer different questions, and the frost range, on how to read the range around Port Hueneme's dates instead of trusting one.